Got mine this week from Amazon. At first, I thought I had a defective unit because I had no sound no matter what I tried, for playing a downloaded video with MP3 sound. So I had Amazon send a replacement. Then I figured out that I needed to stop using RAW and used the other setting instead, and things magically started working. When Amazon sends the replacement, I'll send back the unopened one.
Also, could get no access to my Windows 7 computers. Followed many threads here with no luck. Finally stumbled upon one post that linked to an instruction blog on Brite-View's site that had a few registry settings to change... to allow everyone to include anonymous access. That was key, but I was still not quite there.
I set the directory that had my video files to "everyone access, full control," quit the homegroup stuff, messed with a few more advanced sharing settings, and Windows 7 sharing started working, too... no more "logon fail" message, and no more logon prompts, either. Just like my XP boxes were right from the start.
This thing is the greatest ever. Videos play back flawlessly, and it even looks like there's some upscaling involved in low resolution videos. My 720p blu-ray rips give great dolby digital sound when I use the RAW sound setting. My Harmony remote is now set up with the commands.
Bottom line, I'm thrilled. Was waiting for the Pop-Box to come out, but I don't need Netflix, Youtube, Pandora, as I get those on my Blu-ray player. And I could always spend the $30-40 and get Playon and still be under the Pop-Box price.